| Season: | 2015 |
| Nextseason: | 2016 |
The 2015 Football Federation South Australia season was the 109th season of soccer in South Australia, and the third under the National Premier Leagues format.
| Competition: | NPL South Australia |
| Season: | 2015 |
| Winners: | West Adelaide |
| Premiers: | West Adelaide |
| Relegated: | Port Adelaide Pirates, Modbury Jets, White City, Para Hills Knights |
| Matches: | 182 |
| Total Goals: | 611 |
| League Topscorer: | Michael Matricciani (22 goals) |
| Biggest Home Win: | Adelaide Blue Eagles 6−0 Modbury Jets (19 February 2015) West Adelaide 7−1 Modbury Jets (18 April 2015) |
| Biggest Away Win: | Adelaide Comets 1−8 Adelaide City (11 April 2015) |
| Highest Scoring: | 9 goals Adelaide Comets 1−8 Adelaide City (11 April 2015) |
| Prevseason: | 2014 |
| Nextseason: | 2016 |
The National Premier League South Australia 2015 season was played over 26 rounds, from February to August 2015.
| Rank | Player | Club | Goals[1] |
|---|---|---|---|
| 1 |  Michael Matricciani | Campbelltown City | 22 |
| 2 | Tom Briscoe | West Adelaide | 20 |
| 3 | Kym Harris | Adelaide Blue Eagles | 19 |
| 4 | Elvis Kamsoba | Adelaide Raiders | 15 |
| Nicholas Bucco | Adelaide City | ||
| Ryan Kitto | West Torrens Birkalla | ||
| 7 | Anthony Costa | Adelaide City | 14 |
| Paul Radice | West Torrens Birkalla | ||
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| Competition: | NPL State League |
| Season: | 2015 |
| Promoted: | Adelaide United Youth, Adelaide Olympic |
| Relegated: | Adelaide Cobras, Seaford Rangers, Noarlunga United, Northern Demons, Eastern United, Gawler |
| Biggest Home Win: | Adelaide United Youth 13−0 Eastern United (21 June 2015) |
| Biggest Away Win: | Gawler 0−8 Playford City (30 May 2015) |
| Highest Scoring: | Adelaide United Youth 12−3 Adelaide Victory (29 August 2015) |
| Matches: | 240 |
| Total Goals: | 1005 |
| League Topscorer: | Donovan Pollock (34 goals) |
| Prevseason: | 2014 |
| Nextseason: | 2016 |
The 2015 NPL State League was the third edition of the new NPL State League as the second level domestic association football competition in South Australia (and third level within Australia overall). 16 teams competed, all playing each other twice for a total of 30 rounds, with the league and playoff winners at the end of the year promoted to the 2016 National Premier Leagues South Australia.
Correct as of conclusion of Round 30
| Rank | Player | Club | Goals |
|---|---|---|---|
| 1 | Doni Pollock | Adelaide United Youth | 34 |
| 2 | Fausto Erba | Adelaide Olympic | 32 |
| 3 | Matthew Gaston | Playford City Patriots | 26 |
| 4 | Shomari Sabatho | Playford City Patriots | 22 |
| Oliver Grant | The Cove | 22 | |
| Association | Champions | |
| Collegiate Soccer League | Rostrevor Old Collegians | |
| Port Lincoln Soccer Association | South Coast | |
| Riverland Soccer Association | Barmera United | |
| Western Border Football Association | International Mount Gambier |
| Competition: | Women's Premier League |
| Season: | 2015 |
| Premiers: | Metro United |
| Prevseason: | 2014 |
| Nextseason: | 2016 |
This was the last season of the Premier League format before the introduction of the NPL. The 9 teams played a double round-robin for a total of 16 games.
South Australian soccer clubs competed in 2015 for the Federation Cup. Clubs entered from the NPL SA, the State League 1 and State League 2.
This knockout competition was won by Croydon Kings.
The competition also served as the South Australian Preliminary Rounds for the 2015 FFA Cup. In addition to the Croydon Kings, North Eastern MetroStars (as the 2014 National Premier Leagues Champion), and the A-League club Adelaide United qualified for the final rounds, entering at the Round of 32.